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Cobaltkoritnigite

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Formula:
(Co,Zn)(HAsO4) · H2O
Colour:
Pale Light purple to intense purple, pale rose red to intense purple-rose
Lustre:
Sub-Vitreous, Greasy, Silky, Dull
Hardness:
2 - 3
Specific Gravity:
3.44 (Calculated)
Crystal System:
Triclinic
Name:
Named by K. Schmetzer, W. Horn, and O. Medenbach in 1981 for the cobalt analog of koritnigite.
Isostructural with:
Small (1 mm or less) acicular crystals in dense radial sprays.
May be confused with erythrite.
Compare also burgessite.


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Classification of CobaltkoritnigiteHide

Approved
Approval Year:
1980
8.CB.20

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
B : With only medium-sized cations, RO4:H2O = 1:1
39.1.4.2

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
1 : A[HXO4]·xH2O
20.10.6

20 : Arsenates (also arsenates with phosphate, but without other anions)
10 : Arsenates of Co and Ni

Physical Properties of CobaltkoritnigiteHide

Sub-Vitreous, Greasy, Silky, Dull
Transparency:
Transparent, Translucent
Colour:
Pale Light purple to intense purple, pale rose red to intense purple-rose
Streak:
Pale poink
Hardness:
2 - 3 on Mohs scale
Hardness Data:
Estimated
Tenacity:
Brittle
Cleavage:
Perfect
{010 perfect; {100} good
Density:
3.44 g/cm3 (Calculated)
Comment:
NJMM 257 (1981)

Optical Data of CobaltkoritnigiteHide

Type:
Biaxial (+)
RI values:
nα = 1.646 nβ = 1.668 nγ = 1.705
2V:
Measured: 78° , Calculated: 78°
Birefringence:
0.059
Max Birefringence:
δ = 0.059
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
weak
Optical Extinction:
X ^ b = 3°, Y ^ a = 12.5°
Pleochroism:
Strong
Comments:
X=deep violet, Y=reddish violet; Z=bluish violet

Chemical Properties of CobaltkoritnigiteHide

Formula:
(Co,Zn)(HAsO4) · H2O
IMA Formula:
Co(AsO3OH) · H2O

Crystallography of CobaltkoritnigiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 7.95 Å, b = 15.83 Å, c = 6.67 Å
α = 90.9°, β = 96.6°, γ = 90.0°
Ratio:
a:b:c = 0.502 : 1 : 0.421
Unit Cell V:
833.74 ų (Calculated from Unit Cell)
Z:
8
Comment:
NJMM 257 (1981)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.94 (100)
7.07 (20)
3.82 (50)
3.25 (40)
3.23 (40)
3.14 (70)
2.69 (30)
2.46 (40)
Comments:
ICDD 35-499

Type Occurrence of CobaltkoritnigiteHide

Geological Setting of Type Material:
Oxidized cobalt ore, post-mining
Associated Minerals at Type Locality:

Synonyms of CobaltkoritnigiteHide

Other Language Names for CobaltkoritnigiteHide

Relationship of Cobaltkoritnigite to other SpeciesHide

Other Members of this group:
KoritnigiteZn(HAsO4) · H2OTric. 1 : P1
MagnesiokoritnigiteMg(AsO3OH)·H2OTric. 1 : P1

Common AssociatesHide

Associated Minerals Based on Photo Data:
Erythrite4 photos of Cobaltkoritnigite associated with Erythrite on mindat.org.
Koritnigite2 photos of Cobaltkoritnigite associated with Koritnigite on mindat.org.
Moorhouseite1 photo of Cobaltkoritnigite associated with Moorhouseite on mindat.org.
Skutterudite1 photo of Cobaltkoritnigite associated with Skutterudite on mindat.org.
Baryte1 photo of Cobaltkoritnigite associated with Baryte on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.CB.05SerrabrancaiteMnPO4 · H2OMon. 2/m : B2/b
8.CB.10Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2OMon. 2/m : B2/b
8.CB.10SainfelditeCaCa2Ca2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
8.CB.10VillyaelleniteMnMn2Ca2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
8.CB.10UM1997-09-AsO:CaHMgZn(Mg,Ca,Zn)5(AsO4)2(HAsO4)2 · 4H2OMon.
8.CB.10NyholmiteCd3Zn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
8.CB.10MiguelromeroiteMnMn2Mn2(AsO4)2(HAsO4)2 · 4H2OMon. 2/m : B2/b
8.CB.15FluckiteCaMn2+(HAsO4)2 · 2H2OTric. 1 : P1
8.CB.15KrautiteMn(HAsO4) · H2OMon. 2 : P21
8.CB.20KoritnigiteZn(HAsO4) · H2OTric. 1 : P1
8.CB.25YvoniteCu(HAsO4) · 2H2OTric.
8.CB.30GeminiteCu(HAsO4) · H2OTric.
8.CB.35SchubneliteFe3+VO4 · H2OTric.
8.CB.40RadovaniteCu2Fe3+(AsO4)(HAs3+O3)2 · H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.CB.45KazakhstaniteFe3+5V4+3V5+12O39(OH)9 · 9H2OMon.
8.CB.50KolovratiteNixZny(VO4)0.67(x+y) · nH2O
8.CB.55IrhtemiteCa4Mg(AsO4)2(HAsO4)2 · 4H2OMon.
8.CB.60BurgessiteCo2(HAsO4)2 · 5H2OMon. 2/m

Related Minerals - Dana Grouping (8th Ed.)Hide

39.1.4.1KoritnigiteZn(HAsO4) · H2OTric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.10.1ErythriteCo3(AsO4)2 · 8H2OMon. 2/m : B2/m
20.10.2CobaltaustiniteCaCo(AsO4)(OH)Orth. 2 2 2 : P21 21 21
20.10.3RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2OMon. 2/m : P21/b
20.10.4β-RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2OTric.
20.10.5WendwilsoniteCa2Mg(AsO4)2 · 2H2OMon. 2/m : P21/b
20.10.7AerugiteNi8.5(AsO4)2As5+O8Mon. 2/m : B2/m
20.10.8XanthiositeNi3(AsO4)2Mon. 2/m : P21/b
20.10.9AnnabergiteNi3(AsO4)2 · 8H2OMon. 2/m : B2/m
20.10.10SmolyaninoviteCo3Fe3+2(AsO4)4 · 11H2OOrth.
20.10.11NickelaustiniteCaNi(AsO4)(OH)Orth. 2 2 2 : P21 21 21

Fluorescence of CobaltkoritnigiteHide

Not fluorescent

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for CobaltkoritnigiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Zeit. Anorg. All. Chemie (1979): 454: 134-144.
NJMM 237 (1980)
Schmetzer, K., W. Horn & O. Medenbach (1981): Über Kobaltkoritnigit, (Co,Zn)[H2O/ AsO3OH], ein neues Mineral und Pitticit, Fe2O3 · As2O5 · 9-10 H2O, ein röntgenamorphes Fe-Arsenat-Hydrat. Neues Jahrbuch für Mineralogie, Monatshefte, 257-266.
American Mineralogist: 67: 414.

Internet Links for CobaltkoritnigiteHide

Localities for CobaltkoritnigiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Karlovy Vary Region
      • Krušné Hory Mts (Erzgebirge)
        • Jáchymov District (St Joachimsthal)
Lapis 2002(7/8), 63-65
      • Mariánské Lázně (Marienbad)
        • Slavkovský Les Mtn
M.E. Ciriotti, 2006, probed EDX+XRD by S. Möckel
Germany
 
  • Baden-Württemberg
    • Black Forest
      • Alpirsbach
K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
      • Schenkenzell
        • Wittichen
          • Böckelsbach valley
collection Joachim Esche
Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
          • Burgfelsen
No reference listed
          • Heubach Valley
No reference listed
http://wittichen.strahlen.org/ ; Collection Elamr Lackner and many others
      • Wolfach
        • Oberwolfach
          • Rankach valley
U. Kolitsch, J. Gröbner, G. Blaß, H.-W. Graf und A. Pring (2005): Neufunde aus der Grube Clara im mittleren Schwarzwald (II): Dreyerit, Gasparit-(Ce), Klinobisvanit, Kobaltkoritnigit, Metatyuyamunit, Roscoelith, Sengierit, Vésigniéit und Wakefieldit. Lapis 30 (9), 35-39; 58. (in German)
  • Hesse
    • Odenwald
      • Abtsteinach
        • Mackenheim
    • Richelsdorf District
      • Bauhaus
No reference listed
      • Nentershausen
        • Süß
          • Richelsdorf Smelter
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1992
  • Lower Saxony
    • Harz
      • Braunlage
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • St Andreasberg District
        • Oder valley
Gröbner, J., Hajek, W., Junker, R. & Nikoleizig, J. (2011): Neue Mineralschätze des Harzes. Papierflieger Verlag GmbH, Clausthal-Zellerfeld, Germany, 127 pp.
  • Rhineland-Palatinate
    • Siegerland
      • Niederfischbach
Weiss: "Mineralfundstellen, Deutschland West", 1990
  • Saxony
    • Erzgebirge
Wittern, A. (2001): Mineralfundorte und ihre Minerale in Deutschland. Schweizerbart, Stuttgart, 288 pp.
        • Annaberg-Buchholz
Handbook of Mineralogy
      • Lauter-Bernsbach
        • Oberpfannenstiel
https://www.mineralienatlas.de/lexikon/index.php/Deutschland/Sachsen/Erzgebirgskreis/Lauter-Bernsbach/Oberpfannenstiel/Stollen%20Nr.%207%20%28Sulfidnaja%29
      • Schneeberg District
        • Neustädtel
Lapis 30(7/8):41-70 (2005)
Lapis 30(7/8):41-70 (2005)
Lapis 30(7/8):41-70 (2005)
[Schmetzer et al: N. Jb. Miner. Mh. 1981, 257-266]
Japan
 
  • Honshu Island
    • Kanto region
      • Tochigi Prefecture
        • Nikko City
          • Ashio-machi
Okada et al (1994) Abstracts, IMA General Meeting, 1994, 307-308.
Morocco
 
  • Drâa-Tafilalet Region
    • Ouarzazate Province
      • Tazenakht
        • Bou Azzer District (Bou Azer District)
          • Aghbar
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Aït Ahmane
JP Barral collection
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
          • Bou Azer
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
Favreau, G., Dietrich, J. E., Meisser, N., Brugger, J., Ait Haddouch, L. & Maacha, L. (2007): Bou Azzer, Morocco. Mineralogical Record 38, 345-407
          • Ightem
Favreau, G., Dietrich, J. E., Meisser, N., Brugger, J., Ait Haddouch, L. & Maacha, L. (2007): Bou Azzer, Morocco. Mineralogical Record 38, 345-407
          • Tamdrost
Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
Spain
 
  • Catalonia
    • Girona (Gerona)
      • Ripollès
        • Camprodon
          • Rocabruna
Joan Rosell
Switzerland
 
  • Wallis (Valais)
    • Anniviers Valley
      • Saint-Luc
Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer)
Mineral and/or Locality  
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